RS-1 and RS-2 both contained sensitive Mode A (145 MHz uplink and 29
MHz downlink) linear transponders telemetry beacon and Codestore unit similar
to AMSAT-OSCAR 6. Transponders aboard RS-1 and RS-2 could be kept operating
for only a few months before battery problems disabled both spacecraft.

[Need to research - Now over 15 years old, RS-1 is still giving
signals. Its battery open circuited soon after launch, but the spacecraft's
29.401 MHz beacon can still be heard sending "55" when the solar cells
are in full sunlight. Sadly, the power is insufficient to provide that
needed to operate the Mode-A transponder.]
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